ASTM_D_1519_-_95_2019.pdf

Designation:D151995(Reapproved 2019)Standard Test Methods forRubber ChemicalsDetermination of Melting Range1This standard is issued under the fixed designation D1519;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of themelting range of commercial rubber processing chemicalseither by use of capillary melting point tubes or by differentialscanning calorimetry(DSC).1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesE1 Specification for ASTM Liquid-in-Glass ThermometersE324 Test Method for Relative Initial and Final MeltingPoints and the Melting Range of Organic ChemicalsE473 Terminology Relating to Thermal Analysis and Rhe-ologyE967 Test Method for Temperature Calibration of Differen-tial Scanning Calorimeters and Differential Thermal Ana-lyzers3.Terminology3.1 Definitions:3.1.1 differential scanning calorimetrysee TerminologyE473.4.Significance and Use4.1 This test method may be used for research and devel-opment.It also may be used for quality assurance,provided astandard has been agreed upon between a producer and a user.4.2 For identification purposes,melting range should besupplemented by measurements of a more specific physical andchemical property.4.3 This test method is not recommended for rubber chemi-cals that decompose at their melting ranges.4.4 The melting range as determined by Test MethodACapillary Tube Melting Range is not recommended as acriterion of purity of a rubber chemical.5.Sampling5.1 Grind a representative sample of the chemical to betested with a mortar and pestle,if necessary,to pass completelythrough a 150-m(No.100)sieve.Use the sample withoutfurther treatment.TEST METHOD ACAPILLARY TUBE MELTINGRANGE6.Apparatus6.1 Melting ApparatusAny electric melting apparatus thatsatisfies the requirements of Test Method E324 may be used orany suitable manually heated oil bath such as Hershberg tube.6.2 Capillary TubeThe capillary tube to contain thesample shall be a glass tube approximately 150 mm long and1.2 to 1.4 mm in internal diameter with walls 0.2 to 0.3 mmthick and closed at one end.6.3 ThermometerThe thermometer shall be of the partialimmersion type and of suitable range selected from Specifica-tion E1,or of an equivalent range as specified by the ChemicalManufacturers Association.It shall be divided into subdivi-sions of 0.5C(1F)or less.Corrections for the thermometershall be determined by calibration against a thermometercertified by National Institute of Standards and Technology.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and Rubber-like Materials and is the direct responsibility of SubcommitteeD11.11 on Chemical Analysis.Current edition approved Jan.1,2019.Published January 2019.Originallyapproved in 1995.Last previous edition approved in 2014 as D1519 95(2014).DOI:10.1520/D1519-95R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.4 SieveA 150-m(No.100)sieve for screening thesample shall be provided.7.Procedure7.1 Select the thermometer of the proper range and supportit so that it is immersed to the immersion mark in the liquid ofthe bath.7.2 Charge the capillary glass tube with sufficient powder toform a column in the bottom of the tube about 3 to 6-mm highwhen packed down as closely as possible by moderate tappingon a so